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- W2626843779 abstract "An extension of the point kinetics model is developed to describe the neutron multiplicity response of a bare uranium object under interrogation by an associated particle imaging deuterium–tritium (D-T) measurement system. This extended model is used to estimate the total neutron multiplication of the uranium. Both MCNPX-PoliMi simulations and data from active interrogation measurements of highly enriched and depleted uranium geometries are used to evaluate the potential of this method and to identify the sources of systematic error. The detection efficiency correction for measured coincidence response is identified as a large source of systematic error. If the detection process is not considered, results suggest that the method can estimate total multiplication to within 13% of the simulated value. Values for multiplicity constants in the point kinetics equations are sensitive to enrichment due to ( $n$ , xn) interactions by D-T neutrons and can introduce another significant source of systematic bias. This can theoretically be corrected if isotopic composition is known a priori . The spatial dependence of multiplication is also suspected of introducing further systematic bias for high multiplication uranium objects." @default.
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- W2626843779 date "2017-07-01" @default.
- W2626843779 modified "2023-09-24" @default.
- W2626843779 title "A Point Kinetics Model for Estimating Neutron Multiplication of Bare Uranium Metal in Tagged Neutron Measurements" @default.
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- W2626843779 doi "https://doi.org/10.1109/tns.2017.2715238" @default.
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